package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;

    /**
     * 上传
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) throws IOException {
        log.info(file.toString());

        String filename = file.getOriginalFilename();
        String suffix = filename.substring(filename.lastIndexOf("."));

        String fileName = UUID.randomUUID().toString() + suffix;

        File dir = new File(basePath);
        if(!dir.exists()){
            dir.mkdirs();
        }
            file.transferTo(new File(basePath +fileName));
        return R.success(fileName);
    }

    /**
     * 下载
     * @param name
     * @param response
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {
            //输入流
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
            //输出流
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");
//            int len = 0;
//            byte[] bytes = new byte[1024];
//            while ((len = fileInputStream.read(bytes)) != -1){
//                outputStream.write(bytes,0,len);
//                outputStream.flush();
//            }
            IOUtils.copy(fileInputStream,outputStream);
            //关闭资源
            outputStream.close();
            fileInputStream.close();
    }
}
